<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
    <script src="./js/vue-router.js"></script>
    <style>
        #app{
            display: flex;
            background-color: aliceblue;
        }
        .nav{
            width: 200px;
            height: 800px;
            border: 1px solid lawngreen;
        }
        .content{
            border: 1px solid lawngreen;
        }
    </style>
</head>
<body>
    <div id="app">
        <div class="nav"></div>
        <div class="content"></div>
    </div>
</body>
</html>